## Summary
Fixed multiple TypeScript errors that were preventing the production
build from completing on Railway.
## Changes Made
### Nullable Type Fixes
- Fixed `searchParams.toString()` calls with optional chaining (`?.`)
and fallback values
- Fixed `pathname` nullable access in UpdateToastClient
- Added fallbacks for undefined values in translation interpolations
### Type Consistency Fixes
- Fixed recency parameter handling (string from URL, converted to number
internally)
- Removed duplicate local interface definitions for Party and User types
- Fixed Party type mismatches by using global type definitions
### API Route Error Handling
- Fixed error type checking in catch blocks for login/signup routes
- Added proper type guards for axios error objects
### Component Props Fixes
- Fixed RadixSelect.Trigger by removing invalid placeholder prop
- Fixed Toast and Tooltip components by using Omit to exclude
conflicting content type
- Added missing onAdvancedFilter prop to FilterBar components
- Fixed PartyFooter props with required parameters
## Test Plan
- [x] Fixed all TypeScript compilation errors locally
- [ ] Production build should complete successfully on Railway
- [ ] All affected components should function correctly
🤖 Generated with [Claude Code](https://claude.ai/code)
---------
Co-authored-by: Claude <noreply@anthropic.com>
## Summary
- Fixes periodic production crashes (undici ECONNREFUSED ::1) by
bounding server cache size/lifetime and hardening server HTTP client.
### Root cause
- React server cache (cache(...)) held axios responses indefinitely
across many parameter combinations, causing slow memory growth until the
Next.js app router worker was OOM-killed. The main server then failed
IPC to the worker (ECONNREFUSED ::1:<port>).
### Changes
- `app/lib/data.ts`: Replace unbounded cache(...) with unstable_cache
and explicit keys; TTLs: 60s for teams/detail/favorites/user, 300s for
meta (jobs/skills/accessories/raids/version).
- `app/lib/api-utils.ts`: Add shared Axios instance with 15s timeout and
keepAlive http/https agents; apply to GET/POST/PUT/DELETE helpers.
- `pages/api/preview/[shortcode].ts`: Remove duplicate handler to dedupe
route; retain the .tsx variant using `NEXT_PUBLIC_SIERO_API_URL`.
### Notes
- Build currently has pre-existing app/pages route duplication errors;
out of scope here but unrelated to this fix.
- Ensure `NEXT_PUBLIC_SIERO_API_URL` and `NEXT_PUBLIC_SIERO_OAUTH_URL`
are set on Railway.
### Risk/impact
- Low risk; behavior is unchanged aside from bounded caching and
resilient HTTP.
- Cache TTLs can be tuned later if needed.
### Test plan
- Verify saved/teams/user pages load and revalidate after TTL.
- Validate API routes still proxy correctly; timeouts occur after ~15s
for hung upstreams.
- Monitor memory over several days; expect stable usage without steady
growth.
